Question

qual a resposta de (12+x)²

Answer 1

(12+x)²

(12+x)(12+x) 
144+12x+12x+x² 
x²+24x+144=0 

Δ= 24²-4.1.144
Δ=576-576
Δ=0 

X=-b/2a
X=-24/2
X=-12  

S=[x ∈ R / x<0]